Is a Circle of Stars Druid’s Chalice form affected by Grave Cleric’s Circle of Mortality?

If a Stars Druid/Grave Cleric multiclass were to use a Cure Wounds on an unconscious creature at 0 hp, and they designate that creature as a target of their Chalice form’s healing ability, does that mean they receive 16+double wisdom mod healing, or 8+1d8+double wisdom mod healing?

Circle of Mortality

At 1st level, you gain the ability to manipulate the line between life and death. When you would normally roll one or more dice to restore hit points with a spell to a creature at 0 hit points, you instead use the highest number possible for each die.

Chalice. A constellation of a life-giving goblet appears on you. Whenever you cast a spell using a spell slot that restores hit points to a creature, you or another creature within 30 feet of you can regain hit points equal to 1d8 + your Wisdom modifier.